>Ingo just raised this as an issue for paravirt_ops as well. I don't >quite follow what's going on there. My understanding is that there are >some old versions of glibc (which were unreleased CVS snapshots shipped >by some vendors) which don't use the vdso's ELF header, but instead have >their own canned one which built into the library itself. Perhaps you meanwhile saw the similar question from Keir regarding this (and my answer), but in short: plain glibc 2.3.2 (at least) supports AT_SYSINFO but not AT_SYSINFO_HDR. In this scenario, moving the vDSO around is fine, but glibc-internal (arguably broken) consistency checks prevent the vDSO from being accepted when not using COMPAT_VDSO. Jan
